Abstract Nowadays, anticounterfeiting technology and information security by solvent-free photoluminescent polymeric latex nanoparticles are of considerable interest in variety of hi-tech systems. Herein and for the first time, Rhodamine B ethylenediamine acrylate (N-RhBAc) was synthesized and copolymerized with methyl methacrylate and glycidyl methacrylate to obtain epoxy-functionalized fluorescent latex nanoparticles (RhAcL-series) through emulsion polymerization. Inclusion of N-RhBAc into the spherical polyacrylic nanoparticles with average particle size of 40−70 nm enhanced its absorption intensity (λmax of 571 nm) and emission intensity (λem of 588 nm) up to 8 and 3.5-fold with respect to N-RhBAc in the solution state (λmax of 524 nm and λem of 582 nm), respectively. The nanometric size of particles and decorated epoxy functional groups on their outer layer provided well-wetting and fine-diffusion into the cellulosic nanofiber. To obtain anticounterfeiting inks with high-resolution marking on cellulosic paper without spreading and tracing, fluorescent RhAcL-1 was formulated with required thickening agent and defoamer. The painted pattern by the above ink could immediately be developed and illuminated with brilliant red-pink fluorescence emission upon UV irradiation.

中文翻译：

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基于罗丹明 B 改性的环氧官能化聚丙烯酸纳米粒子的无溶剂防伪荧光油墨，用于纤维素基材

摘要 如今，无溶剂光致发光聚合物乳胶纳米粒子的防伪技术和信息安全在各种高科技系统中引起了极大的兴趣。本文首次合成了罗丹明B乙二胺丙烯酸酯（N-RhBAc），并与甲基丙烯酸甲酯和甲基丙烯酸缩水甘油酯共聚，通过乳液聚合获得环氧官能化荧光乳胶纳米粒子（RhAcL系列）。将 N-RhBAc 包含在平均粒径为 40-70 nm 的球形聚丙烯酸纳米粒子中，其吸收强度（λmax 为 571 nm）和发射强度（λem 为 588 nm）相对于 N-提高了 8 倍和 3.5 倍溶液状态下的 RhBAc（λmax 为 524 nm，λem 为 582 nm）。颗粒的纳米尺寸和外层装饰的环氧官能团提供了良好的润湿性和良好的扩散到纤维素纳米纤维中。为了在纤维素纸上获得具有高分辨率标记的防伪油墨，无需铺展和追踪，荧光RhAcL-1 与所需的增稠剂和消泡剂一起配制。用上述墨水绘制的图案可以立即显影，并在紫外线照射下发出鲜艳的红粉色荧光。